"tribune" above the pits. And that really sucks!
I've had tickets for that grandstand twice & I loved it. it's a great spot for watching the build up & even better if you've got a good zoom on your camera.
The other reason is you can lean right over the barrier at the front & look straight down on to the pit lane. I got some great pic's of the Audi pitstops last year (just hold tight onto your camera etc)
1 thing to be wary of is the pitch. it is very steep so hold on tight!